Ecology and Resilient Infrastructure

응용생태공학회 (Korean Society of Ecology and Infrastructure Engineering)
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공릉천에서의 어류와 저서무척추 동물에 대한 복합 서식처 적합도 지수의 계산

Computation of composite suitability index for fish and macroinvertebrate species in the Gongneung River

  • 투고 : 2017.06.22
  • 심사 : 2017.07.03
  • 발행 : 2017.06.30
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초록

본 연구는 공릉천에서 서식하는 어류와 저서무척추 동물을 대상으로 물리서식처 분석을 실시하였다. 연구대상 어류는 밀어와 피라미, 저서무척추 동물 종은 깔따구류와 줄날도래종을 선정하였다. 어류와 저서무척추 동물의 서식처 적합도 지수는 2010년 수생태계 건강성조사 및 평가사업을 통하여 구축된 생태모니터링 자료를 사용하였다. 복합서식처 적합도 지수의 계산은 가중치법을 이용하였으며, 저서무척추 동물의 경우 계층화분석법을 이용하여 산정된 가중치를 적용하였다. 흐름모의는 2차원 흐름모형인 River2D 모형을 사용하였다. 모의 대상하천의 갈수량, 저수량, 평수량, 풍수량에 대하여 어류와 저서무척추 동물의 복합서식처지수의 분포를 모의하였다. 모의결과 깔따구류와 줄날도래는 각각 소와 여울의 서식처를 선호하였으며, 피라미와 밀어는 여울의 서식처를 선호하는 것으로 모의되었다.

This study performed physical habitat simulation for fish and macroinvertebrate species in the Gongneung River. Target fishes were selected as Rhinogobius brunneus and Zacco platypus. Target macroinvertebrate species were selected as Hydropsyche kozhantschikovi and Chironomidae. Habitat suitability curves were constructed by using monitoring data from the monitoring project which is called "the survey and evaluation of aquatic ecosystem health". For calculation of CSI, weighted mean method was used. For macroinvertebrates species, the weighting factor derived from analytic hierarchy method was considered. River2D, which is capable to simulate flow in two-dimensional space, was selected for flow computation. Composite suitability index was simulated for target fish and macroinvertebrate species for discharge of drought, low, normal, and averaged-wet flow. Simulation results show that Chironomidae and Hydropsyche kozhantschikovi prefer the pool and riffle habitat, respectively. Rhinogobius brunneus and Zacco platypus show high suitability in riffle habitat.

키워드

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